Railroad underpass work to improve safety, access to Springfield’s Riverfront Park Updated Feb 18, 2021; Posted Feb 18, 2021 The railroad underpass leading to Springfield's Riverfront park will get an upgrade under the recently passed state transportation bond bill. (Don Treeger/ The Republican) Facebook Share SPRINGFIELD — The state’s $16 billion transportation bond bill includes $1.5 million to upgrade a railroad underpass to make it easier and safer to walk from the city’s downtown to Riverfront Park and the banks of the Connecticut River. The money would upgrade the underpass and approaches to it, to make the park area compliant with the federal Americans with Disabilities Act, says Christopher M. Cignoli, the city’s public works director.